Since 1962-63, LeBron James has lost the most games in the NBA Finals, with 33 losses.

which player has most finals games lost since 1963

NAME	L	SERIES	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
LeBron James	33	NBA Finals	55	42.5	28.4	10.2	7.8	1.7	0.8	3.9	10.7	22.1	48.4	1.8	5.2	35.2	5.2	7.1	73.1	2,337	1,562	561	430	93	46	217	130	-86
Jerry West	29	NBA Finals	48	43.0	30.4	5.0	6.0				11.2	24.4	46.0				8.0	9.7	82.2	2,065	1,461	242	287				134
Kareem Abdul-Jabbar	27	NBA Finals	56	37.2	23.5	9.1	3.2	0.9	2.2	2.7	9.7	18.6	52.3	0.0	0.0	0.0	4.1	5.8	70.0	2,082	1,317	507	181	45	116	121	196
Magic Johnson	26	NBA Finals	50	40.9	19.4	7.9	11.7	2.0	0.3	3.8	6.8	13.1	51.6	0.2	0.8	23.7	5.7	6.5	87.4	2,044	971	397	584	102	16	190	147
Michael Cooper	23	NBA Finals	46	30.6	10.3	2.9	3.9	1.3	0.4	1.3	3.9	8.7	44.7	0.8	2.0	38.0	1.8	2.2	80.6	1,406	474	135	178	59	20	60	159
Danny Ainge	21	NBA Finals	37	28.3	10.4	2.6	4.1	1.2	0.1	1.5	4.2	9.0	47.0	0.7	1.8	41.5	1.2	1.6	75.9	1,048	383	95	150	46	4	56	106
Elgin Baylor	20	NBA Finals	33	41.2	23.8	12.8	3.9				9.3	21.1	44.0				5.2	7.1	73.8	1,360	786	421	128				100
Derek Fisher	19	NBA Finals	43	28.2	8.7	2.2	2.4	1.0	0.0	1.0	3.0	6.9	42.9	1.1	2.7	41.7	1.7	2.1	81.3	1,212	376	94	103	45	1	41	127	+110
Wilt Chamberlain	19	NBA Finals	35	47.3	18.6	24.6	3.8				7.5	13.5	55.9				3.5	9.4	37.7	1,657	652	862	134				101
James Worthy	18	NBA Finals	34	39.6	22.2	5.0	3.3	1.0	0.6	2.0	9.2	17.3	53.3	0.1	0.4	20.0	3.6	5.3	68.3	1,346	754	171	112	34	20	68	88
Dennis Johnson	18	NBA Finals	37	40.1	18.3	4.7	6.2	1.3	1.1	2.7	6.8	16.3	42.0	0.2	1.0	16.0	4.5	5.5	81.0	1,483	676	175	228	48	39	100	106
Mel Counts	18	NBA Finals	29	15.3	6.8	5.8	0.8				2.7	6.1	44.6				1.3	1.7	78.0	445	197	168	24				95
Andre Iguodala	17	NBA Finals	36	27.0	8.5	4.0	3.1	0.9	0.7	0.9	3.4	6.9	49.0	1.1	3.2	36.0	0.6	1.5	37.0	973	305	143	112	31	25	33	75	+70
Don Nelson	17	NBA Finals	38	19.9	8.4	5.2	1.1	0.2	0.0		3.2	7.1	45.0				2.0	2.7	74.0	757	319	199	43	2	0		103
JR Smith	16	NBA Finals	25	30.0	9.7	2.7	1.0	0.9	0.4	0.6	3.4	8.9	37.7	2.4	6.2	38.1	0.6	1.1	59.3	749	243	67	24	22	9	16	71	-112
Kurt Rambis	16	NBA Finals	34	17.1	5.6	5.2	0.6	0.6	0.4	1.1	2.3	4.3	53.1	0.0	0.0		1.0	1.7	57.6	582	190	176	22	19	14	36	92
Keith Erickson	16	NBA Finals	25	27.5	7.9	4.4	2.4	0.7	0.2		3.4	8.4	40.5				1.1	1.6	69.2	688	197	111	59	4	1		83
John Havlicek	16	NBA Finals	47	39.8	21.7	7.4	4.1	1.2	0.2		8.3	19.7	42.1				5.1	6.0	84.8	1,872	1,020	350	195	15	3		154
Tristan Thompson	15	NBA Finals	22	31.7	8.5	9.0	0.9	0.4	0.8	0.7	3.5	6.3	55.4	0.0	0.0		1.5	2.7	55.9	698	187	199	20	9	18	16	54	-101
Richard Jefferson	15	NBA Finals	22	26.2	8.0	4.8	1.0	1.0	0.2	1.3	3.0	6.5	45.8	0.1	0.7	12.5	2.0	2.9	67.2	577	175	106	21	22	4	29	58	-41
A.C. Green	15	NBA Finals	28	26.3	7.5	6.3	0.4	0.5	0.1	0.9	2.8	5.8	47.8	0.1	0.2	33.3	2.0	2.8	70.5	736	211	177	11	13	3	26	73	-27
Larry Bird	15	NBA Finals	31	42.8	23.1	11.6	6.0	2.0	0.8	2.9	8.4	18.3	45.8	0.6	1.5	42.2	5.7	6.5	87.2	1,326	716	361	187	63	24	91	80
Kevin McHale	15	NBA Finals	31	32.5	17.9	7.4	1.4	0.3	1.4	2.3	6.8	12.5	54.4	0.0	0.1	0.0	4.4	5.7	76.8	1,009	556	230	43	10	44	70	95
Robert Parish	15	NBA Finals	31	32.9	15.4	8.4	1.3	1.0	1.7	2.1	6.3	13.1	48.3	0.0	0.0	0.0	2.7	4.4	63.0	1,020	477	260	40	32	54	65	108
Wes Unseld	15	NBA Finals	20	41.3	11.4	14.1	4.1	0.9	0.5	1.3	4.7	10.0	47.2				2.0	3.3	59.1	825	227	282	82	14	8	15	68